For anyone struggling with LR, I find that evidence helps me a lot with assumpution family questions. Now realize I'm not saying that the conclusion is not important, because it obviosuly is. At some point though I realized that recognizing the core, and focusing on the evidence would help me to focus on the gap in the argument, and since I knew that the evidence is what we know is without a doubt true, the CR must be something that keeps intact the premise (whether stated or unstated) and at the same time validiate, or invalidate the conclusion. So I simply prephrase the answer, focus on the premise, eliminate answer that are not in the ball park, and finally check to see if it speaks to the conclusion. Of course you have to watch out for premise boosters, but my LR score jumped when I began to think of assumption family question in this way. It's just a different way to think about assumption family questions. I hope it helps someone.